Speaker



FIG. 1 is a perspective view of the speaker;

FIG. 2 is a front view of the speaker;

FIG. 3 is a back view of the speaker

FIG. 4 is a left side view of the speaker;

FIG. 5 is a right side view of the speaker;

FIG. 6 is a top view of the speaker; and,

FIG. 7 is a bottom view of the speaker.

The broken lines in FIG. 3 and FIG. 7 represent the portions of the design that form no part of the claim. 

CLAIM What is claimed is the ornamental design for a speaker, as shown and described. 